何时在句首用being done ?何时不用 ?请说的详细些 因为有些不太明白
就好像这句 being laughted at by others is absolutely no fun 被其他人嘲笑不好玩这里laught表示的是被嘲笑所以用laughted 那为什么还要加个being?
还有这句 driven by a greater demand for green products,the food company has set higher standards to ensure the quality驱动的绿色产品的需求,公司已提出更高的标准,确保质量这里同样是用被动态为何
这句又不用being driven ??/
请大家认真回答